Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf5ea2f08e3814d…

MALICIOUS

PDF

452.5 KB Created: 2021-04-19 12:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f9a8109f1896fe660824f91a8436022a SHA-1: c2e0e024e136321ff5021b65db41a980d8064d6c SHA-256: fcf5ea2f08e3814d83c4e00920b2e8647364c9046d13ec8a6813a0458e1f25cc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains a high-risk heuristic firing for a redirector link, indicating a phishing lure. The ML classifier and ClamAV also flagged it as malicious. The primary URL, https://druttle.ru/strik?utm_term=weird+disneyland+employee+rules, is likely used to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8841

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/strik?utm_term=weird+disneyland+employee+rules PDF link annotation
    • https://cdn.sqhk.co/rarinuva/Vpje3gh/sexusek.pdfIn PDF document text
    • https://cdn.sqhk.co/kapopajij/NidzhfN/cookie_recipe_without_eggs_and_flour.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/Hjiwujd/zibop.pdfIn PDF document text
    • https://cdn.sqhk.co/buzovegom/Bkjd1Sr/cookie_crush_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/Kwij7c3/40664137434.pdfIn PDF document text
    • https://cdn.sqhk.co/wafixagi/6id1xcL/wudopetus.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/iijgjgp/sirapawozageduxasuvur.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/ii4jclB/cash_dozer_lucky_coin_pusher_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/puma_zero_limits_golf_shoes.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_b4d79f06835644d685169f6654027725.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/738fefc0-a0c4-4284-893f-7ad1ebcb9bad/95255394267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc11bd3-295e-4cc2-9ffe-d31bfc35e628/selowevezijujemewifaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eced976-853c-40b8-a80c-88cbbb6731a9/11307899398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c839758d-1154-4270-874e-9a55b08d6d93/43235327362.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_ec73cd06f67a41cdbb71467ce921f029.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4271ee5-737d-4b8f-82ef-f3a6ff3cb3be/78322223275.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/zawujamemozigifumetunof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2955a7-17b1-41b2-835b-12bc195c6a56/59859975968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbcef1e-da0b-414f-aa70-d895801e2a13/furumom.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_ccf147cfcfd844ae90fea79db98dda94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/database_project_examples.pdfIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_ee77a63fe2504a19b065fa33f601a7fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e82086-607a-4468-b55a-a77010bffce4/33000248717.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/is_the_movie_monster_2003_on_netflix.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006c768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C768 5220 bytes
SHA-256: e4e57def9a5fbd347803b27f314530d7d3babb3fc57f7eb49c443fb92a6b5a54
font_01_sfnt_off0006d925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D925 11664 bytes
SHA-256: 03cd69f33cff9d8050bb98e3d1a2d2d5b094ff88ea87fa78cd2ab66193fa1ffc